NullInstruction.cc

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
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    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.
 
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/**
 * @file NullInstruction.cc
 *
 * Implementation of NullInstruction class.
 *
 * @author Ari Metsähalme 2005 (ari.metsahalme-no.spam-tut.fi)
 * @note rating: red
 */
 
#include "NullInstruction.hh"
#include "NullInstructionTemplate.hh"
#include "NullProcedure.hh"
#include "NullAddress.hh"
 
namespace TTAProgram {
 
/////////////////////////////////////////////////////////////////////////////
// NullInstruction
/////////////////////////////////////////////////////////////////////////////
 
NullInstruction NullInstruction::instance_;
 
/**
 * The constructor.
 */
NullInstruction::NullInstruction() :
    Instruction(TTAMachine::NullInstructionTemplate::instance()) {
}
 
/**
 * The destructor.
 */
NullInstruction::~NullInstruction() {
}
 
 
/**
 * Returns an instance of NullInstruction class (singleton).
 *
 * @return Singleton instance of NullInstruction class.
 */
NullInstruction&
NullInstruction::instance() {
    return instance_;
}
 
/**
 * Aborts program with error log message.
 *
 * @return A null procedure.
 * @exception IllegalRegistration never.
 */
Procedure&
NullInstruction::parent() const {
    abortWithError("parent()");
    return NullProcedure::instance();
}
 
/**
 * Aborts program with error log message.
 */
void
NullInstruction::setParent(const Procedure&) {
    abortWithError("setParent()");
}
 
/**
 * Aborts program with error log message.
 *
 * @return False.
 */
bool
NullInstruction::isInProcedure() const {
    abortWithError("isInProcedure()");
    return false;
}
 
/**
 * Aborts program with error log message.
 */
void
NullInstruction::addMove(Move&) {
    abortWithError("addMove()");
}
 
/**
 * Aborts program with error log message.
 *
 * @return -1.
 */
int NullInstruction::moveCount() {
    abortWithError("addMove()");
    return -1;
}
 
/**
 * Aborts program with error log message.
 *
 * @return A null move.
 */
const Move&
NullInstruction::move(int) const {
    abortWithError("addMove()");
    throw OutOfRange(__FILE__,__LINE__,__func__, "Null intruction is empty.");
}
 
/**
 * Aborts program with error log message.
 */
void
NullInstruction::addImmediate(Immediate&) {
    abortWithError("addMove()");
}
 
/**
 * Aborts program with error log message.
 *
 * @return -1.
 */
int NullInstruction::immediateCount() {
    abortWithError("addMove()");
    return -1;
}
 
/**
 * Aborts program with error log message.
 *
 * @return A null immediate.
 */
Immediate&
NullInstruction::immediate(int) {
    abortWithError("addMove()");
    // to avoid warning:
    throw new OutOfRange(__FILE__,__LINE__,__func__,"");
}
 
/**
 * Aborts program with error log message.
 *
 * @return A null address.
 */
Address&
NullInstruction::address() const {
    abortWithError("address()");
    return NullAddress::instance();
}
 
/**
 * Aborts program with error log message.
 *
 * @return -1.
 */
int
NullInstruction::size() const {
    abortWithError("size()");
    return -1;
}
 
}